Granted Patent
Utility
US 5,133,939 · App. 07/673,080
Test tube holder and tray assembly
Inventor:
Stanley R. Mahe
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Mar 21, 1991
Inventor
Stanley R. Mahe
Assignee (at issue)
Barnstead/Thermolyne Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.